Question

Giúp mình với

Answer 1

\(A=2x^2+x-3-\left(2x^2-3x-5\right)-2\)

\(=2x^2+x-3-2x^2+3x+5-2\)

\(=4x\)

\(B=x^2-6x+8-\left(x^2-\dfrac{17}{3}x-2\right)+\dfrac{7}{3}x-10\)

\(=x^2-6x+8-x^2+\dfrac{17}{3}x+2+\dfrac{7}{3}x-10\)

\(=2x\)

\(\Rightarrow A=2B\)